samples: hwmv2: rename espxx_luatos_core files

This board has variant model "usb" and is currently missing
hwmv2 changes.

Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>

tests/kernel/timer/timer_behavior/boards/esp32s3_devkitm.overlay

@@ -1,13 +0,0 @@
-/*
- * Copyright (c) 2023 Intel Corporation
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-/ {
-    resources {
-        compatible = "test-kernel-timer-behavior-external";
-
-        timerout-gpios = <&gpio0 4 GPIO_ACTIVE_LOW>;
-    };
-};